Where do you find the fuse box description for the 2000 vw beetle?

The small white card give you limited information, you must pull it out it is two sided, I suggest you get a Haynes Repair Manual, usually around 14bucks at most auto stores, the back of the book has electrical drawing for the system your working on, i.e. audio system, it will give you the fuse number and Amp, use this information with card located on the fuse panel cover plate to determine location of the fuse in question